Smelting-furnace



\ (No Model.)

S. G. SAGKETT.

SMBL'I'ING FURNAGB.

'No.zfifm. Patented May 22,1883.

- ATTORNEY N. PETERS Pmnrulhegmpher. washinglnn. D. C.

efficient apparatus for iirstroasting the ore IO zontal section of a y the melted lead is raked out through the slagicientlydescribed by referring to them incif vided with a cover, a, to prevent the gases of combustion from escaping that way. As the cylinder B revolves, the sulphurous ore is gradconnected bya channel, E, with a lead-well,

`UNITED, STATES,`

l PATENT OFFICE. l

sEERMAN e. sacknrrr, oF DENVER, coLonADo.

SPECIFICATION forming part of I Jetters Application filed March 145, 1883. (No model.)

'To all whom' it may concern:

Be it known that I, SHERMAN G. SAGKETT, acitizen of the United States, and a resident of Denver, in the county of Arapahoe and State of Colorado, have invented certain new and usefulImprovements in Smelting-Furnaces, of which the following is a specification.

The objectof my invention is toprovide an and then smelting it upon-a reverberatory hearth by hydrocarbon fuel and hot-air blast; and it consists in the construction and combination4 of the various parts, as will be hereinafter described and claimed.

In the accompanying drawings, Figure l lead-smeltin g furnace constructed according to of the same. Fig. 3 is a vertical cross-section on the line scar` of Fig. l, and seen in the direction of arrow l. Fig. 4 is a detail horiportion of the ore-heating device, the section being taken on theline yy of Fig."1.

"Like lettersof reference indicate like parts in the severaltigures.

The construction of the variousparts ofthe apparatus will be plainly understood and sufdentally indescribngthe operation.

l The oreis chargedbymeans o`t`a spoutand hopper, A, into an inclined slowly-revolving cylinder, B. The spout or hopperA is proually roasted by the heat from the furnace,` (which heat passes through thesaid cylinder,) and gradually tumbles down upon an inclined hearth, C, of a low reverberatory furnace, C. It is there melted and runs down into the leadcrucible D, whence the slag ioating on top of tapd, the latter bein-g provided at its outer end in thesideof the furnace with a suitable cover, d. `The bottomof the crucible D is F, into whichthe melted lead enters (when the outer end of the channel E is closed by the plug or gate e) to the samclevel as within' the crucible D. The top of the lead-well Fis covered `by a gate or other cover, f, made of FURNACE.

Patent No. 278,2?9, dated May ea,

nre-clay. It `win ums be seenY (See Eig. 3) una;

.none ot' the slag, but only the melted lead, can

get into the well F, and by removing the cover f the lead can be dipped outof the weil in various quantities, as well forsampling as for casting smaller ingots, or for other purposes, while for emptying the crucible without dipping it is only necessary to remove the plug c from the fendof the bottom channel, E. The brick-work of which the crucible D isformed is inclosed in an iron casing, c, to prevent the lead from accidentally escaping through the crevices in the brick, and also for strengthening and protecting the latter, the said casin g being supported on underlying rails c. An

air-chamber, G, surrounds the casin g c ofthe crucible. This air-chamber G is connected by a channel, g, underlying the hearth C, with a large air-chamber, H, arranged at a distance l underneath the cylinder B. On the side op-- through the pipe K,provided witlria regulating-valve, k, the said pipebeiug arranged vertically, with its lower end in the jet-opening i, as shown in Fig. l. y L is a hopper in the roof of the furnace, above the inclined hearth `(J, for entering the flux necessary for the` smelt-ing.

The cylinderB is revolved upon rollers profv vided in or about bearings at its ends, and is provided with a chain-Wheel, b, by which motion VmayA becommunicated from any suitable machinery to revolve it. The Waste heatfrom the furnace and `cylinder ent-ers into achamber or chimney-breast, M, and thence through a heating-drum, m, which, with the extension fm', also `constitutes the chimney of theffurnacel pipes, N, intowhich air is admitted through its `horizontal exterior branch, N', prvided with a regulating-valve, n'. The interior end `branch ofthe coil N enters the large air-cham ber Hat n. The pressure in the air-chamber H and its connections is regulated by an ad` justable weighted valve, O, arranged upon the outer end of a pipe, o, which leads from the chamber H into the outer atmosphere. A fan So i l ln the latter is arranged a series of IOO or other blower is connected to forceair V 2 y 271mm through the outer branch,.N', into the coil N, whence, heated by the waste heat from the furnace, it enters through the lower branch, n, into the large air-chamber H, in which it expands, and in which, as Well as in a channel, g, chamber G, and channelI, it is heated, or, at least, its heat is retained, as it passes to the jet-openin g t', the circulation of air in the chamber Gr around the Crucible-pan c protecting the latter from being overheated. In the jet-opening t' the air meets and atomizes the liquid hydrocarbon entering into the pipe K, and the vaporized fuel strikes into the fireplace, isthen deflected to whirl over the bridge 7L upto the roof of the furnace, thence reverberated, as indicated by the arrows 2, until, after smelting the ore upon the hearth C, and roasting the feed ore in the cylinder B, and heating the blast in the drum m, it inall y escapes through the chimney m.

Havin g thus described myinventio'mI claim as new and desire to secure by Letters Patent- The combination of the fuel-jet t' K, reverberatory furnace C', having the crucible D, in-

clined hearth C, and HuX-hopper L, the cylinder B, chimney-breast M, heating-drum m, air-coil N, pressure-regulator O o, chambers H G, and the connecting air-channels g I, all constructed and operatin g substantially as hereinbefore set forth.`

I'n testimony that I claim theforegoing as my invention I have signed my name, in presence of two witnesses, this 1st day of March, 1883.

SHERMAN G. SACKETT.

Witnesses:

L. S. SMrTH, J. A. BENTLEY. 

